OpenEuphoria

Testing COM ports

• Posted by John Kinne <JDKINNE at MIAMIU.BITNET> Oct 30, 1996
• 1693 views

Hello All

I am trying to test a COM port, but am not getting anything
reasonable back.  I have a modem on COM2 (on a PCMCIA card)
and am trying to read the response to an ATZ with the following:

object o
integer i,fn
sequence s

fn=open("COM2","ub")
if fn=-1 then
    puts(2,"No Go\n")
else
  printf(1,"The file handle is %d\n",fn)
  puts(fn,"atz\n")
  puts(1,"Com port written to\n")
  printf(1,"\n",{})
  while 1 do
    i=getc(fn)
    if i=-1 then
      puts(1,"All done\n")
      exit
    end if
    puts(1,i)
  end while
end if


The output I get is:

The file handle is 3
Com port written to

96  60
7  7
71  47
0  0


And then the pgm hangs until I press ctl-Break.  I would like to
get an OK back and go on and process - or determine that there is
no modem on COM2 and handle that.  Any ideas?

Thanks

John Kinne